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      Ferroelectricity in ultra-thin perovskite films

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          Abstract

          We report studies of ferroelectricity in ultra-thin perovskite films with realistic electrodes. The results reveal stable ferroelectric states in thin films less than 10 \AA thick with polarization normal to the surface. Under short-circuit boundary conditions, the screening effect of realistic electrodes and the influence of real metal/oxide interfaces on thin film polarization are investigated. Our studies indicate that metallic screening from the electrodes is affected by the difference in work functions at oxide surfaces. We demonstrate this effect in ferroelectric PbTiO\(_3\) and BaTiO\(_3\) films.

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          Author and article information

          Journal
          02 May 2005
          Article
          10.1103/PhysRevB.72.020101
          cond-mat/0505051
          676bab3e-eebf-478a-8386-45bbd2437b60
          History
          Custom metadata
          Phys. Rev. B 72, 020101(R) (2005)
          4 pages in REVTEX4, 4 epsf figures
          cond-mat.mtrl-sci

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